1. Without any logo or text on charging case. 2.Perfectly compatible with iOS/Android and all mobile phones with bluetooth fuction. 3.Auto power on and power off. 4.Could be used separately or together. 5.Upgrade the Bluetooth 5.0 chip, the performance is improved, 10 meters is not stuck & continuous. 6.Hifi stereo and bass. About Dropshipping: 1.Accept Dropshipping, and we will DO NOT put any invoices, QR codes, promotions in the shipment, So Dont worry, Just buy it, we will do anything well for you . 2.We are guarantee each device be tested rigorous before shipped out, SO all products can guarantee 100% high quality before sent out. Thank you very much!!!